1. But golf's growth on a crowded continent faces land-use and environmental constraints . 2. Pipeline companies face government regulation, environmental constraints and social situations. 3. Thus, it is likely a case on convergent evolution dictated by the environmental constraints . 4. Environmental constraints are also a factor, particularly in California.5. Environmental constraints will place further limits on how this part of the exercise is conducted.6. As exosomatic adaptation, culture is determined by environmental constraints . 7. Due to environmental constraints , 4000 citizens had to be resettled between the years 1969 and 1979. 8. :: It's not 100 % clear that racial difference is entirely due to physical environmental constraints . 9. Moreover, Le Guin has painted a very stark picture of the natural and environmental constraints on society. 10. If a process appears profitable, then other factors are considered, such as safety, environmental constraints , controllability, etc.